Saturn at Opposition: Our 2014 Guide: Universe Today

Saturn taken by Joe Lopint on June 26, 2012, AT106 and 4X Televue Powermate, Imaging Source DK0021 video camera, ~1000 images aligned and stacked with Registax

Saturn taken by Joe Lopint on June 26, 2012, AT106 and 4X Televue Powermate, Imaging Source DK0021 video camera, ~1000 images aligned and stacked with Registax

Planet lovers can rejoice: one of the finest jewels of the solar system in returning to the evening night sky.

The planet Saturn reaches opposition next month on May 10th. This means that as the Sun sets to the west, Saturn will rise “opposite” to it in the east, remaining well positioned for observation in the early evening hours throughout the summer season. In fact, we’ll have four of the five naked eye planets above the horizon at once for our evening viewing pleasure in the month of May, as Jupiter also rides high to the west at sunset, Mars just passed opposition last month and Mercury reaches greatest eastern elongation on May 25th. Venus is the solitary holdout, spending a majority of 2014 in the dawn sky.

Saturn will shine at magnitude +0.3 this month and its disk spans an apparent 19,” or 44” if you take into account the apparent width of its rings. The rings are currently tipped open 22 degrees with respect to our line of sight. The ring opening is widening, and will reach a maximum of over 25 degrees in 2017 before the trend reverses. Anyone who remembers observing Saturn back in 2009 will recall that its rings were edge on to our view. This widening of Saturn’s rings also lends itself to a curious effect: although we’re in a cycle of oppositions that are getting farther away — Saturn is 12.5 million kilometres or 0.083 Astronomical Units (A.U.s) more distant in 2014 than it was during opposition last year as it’s headed towards aphelion in 2018 — its widening rings are actually making it appear a bit brighter.

via Saturn at Opposition: Our 2014 Guide.

Eyes on the Sky: April 21 thru April 27

GLogo

Found! First Earth-Size Planet That Could Support Life | Space.com

This artist illustration shows the planet Kepler-186f, the first Earth-size alien planet discovered in the habitable zone of its star.

This artist illustration shows the planet Kepler-186f, the first Earth-size alien planet discovered in the habitable zone of its star.
Credit: NASA Ames/SETI Institute/JPL-CalTech

 

For the first time, scientists have discovered an Earth-size alien planet in the habitable zone of its host star, an “Earth cousin” that just might have liquid water and the right conditions for life.

The newfound planet, called Kepler-186f, was first spotted by NASA’s Kepler space telescope and circles a dim red dwarf star about 490 light-years from Earth. While the host star is dimmer than Earth’s sun and the planet is slightly bigger than Earth, the positioning of the alien world coupled with its size suggests that Kepler-186f could have water on its surface, scientists say. You can learn more about the amazing alien planet find in a video produced by Space.com.

“One of the things we’ve been looking for is maybe an Earth twin, which is an Earth-size planet in the habitable zone of a sunlike star,” Tom Barclay, Kepler scientist and co-author of the new exoplanet research, told Space.com. “This [Kepler-186f] is an Earth-size planet in the habitable zone of a cooler star. So, while it’s not an Earth twin, it is perhaps an Earth cousin. It has similar characteristics, but a different parent.

via Found! First Earth-Size Planet That Could Support Life | Space.com.